Abstract Details
| How Chemical Pressure Effects the Charge Density Wave Transition in Rare-Earth Tritellurides RTe3 | |
|---|---|
| Abstract ID | MAT-16 |
| Presenter | Cathie Condron |
| Presentation Type | Poster |
| Full Author List | C. L. Condron (1) , J-H. Chu (2) , N. Ru (2) , I. R. Fisher (2) , M. F. Toney (1) |
| Affiliations | (1) Stanford Synchrotron Radiation Laboratory, Stanford, CA 94025, USA (2) Geballe Laboratory for Advanced Materials and Department of Applied Physics, Stanford University, Stanford, CA 94305, USA |
| Category | Materials Science |
| Abstract | The family of bilayer, rare-earth tritellurides RTe3 (R = Rare Earth) make up a paramount example of easy tunable 2D materials, that provide a unique playground to investigate the effect chemical pressure on the charge density wave (CDW) transition. RTe3 materials belong to the class of quasi-two-dimensional CDW compounds. The average (un-modulated) structure for RTe3 orthorhombic, space-group Cmcm, and consist of corrugated R2Te2 slabs alternating with pairs of Te-layers stacked along the b axis (long). The formation of the CDW condensate, hosted within the Te-layers, is driven by nesting of the 2D Fermi-surface (FS). Systematic x-ray diffraction studies of the RTe3 series confirm a modulation vector, q1 ~ (2/7)c*, is present in all members of the family, and that the transition temperature increases monotonically with increasing lattice parameter (decreasing elemental weight). A additional modulation vector, q2 ~ (1/3)a*, is observed for the heaviest members of the series, who’s transition temperature decreases with increasing lattice parameter. The temperature dependence of the CDW modulation and lattice parameters will be presented for R = Tb, Dy, and Er. |
| Footnotes | |
| Funding Acknowledgement | |